This transcript has been automatically generated and may not be 100% accurate.

... the US is looking not Obama intended for airway and this is what's news I'm WS J live I'm Joann Co in a Wall Street Journal exclusive report the Pentagon is upgrading its big this bunker Buster bomb ... but the most advanced features intended to an evil it penetrate and destroy Iran's most heavily fortified ... and defended nuclear site ... U S officials see the development of the weapon is key to convincing is rather the US has the ability ... to prevent them from getting a nuclear bomb if diplomacy fails ... and also that ... Israel's military can't do that on its own ... shares of Lincoln are down more than eight percent today despite reporting a surge in profits and revenue for the first quarter ... the stock is falling because the professional social network is showing signs of slowing growth ... after it issued downbeat revenue expectations for the next quarter ... since going public two years ago LinkedIn has ... continued to March higher unlike many of its peers like Groupon and Facebook ... thinking shares have rallied seventy six percent so far this year before today selloff ... Warren Buffett is reassuring investors on succession the Oracle of Omaha says that investors should not worry about his successor ... just as he isn't concerned about the one next leave the companies in which he invests billions of dollars ... he eats year-old chairman and CEO of Berkshire Hathaway telling the Fox business network that he has no plans to retire ... and that he died tonight Berkshire's board knows who you accuse ... ICL ... but that the top candidates could change over time he keep us anomaly this is about instructed and what's news I'm WS J last ...